Drawing attachment for circular looms



L. ATWOOD. DRAWING ATTACHMENT ron CIRCULAR LOOMS. APPLICATION FILED JULY 2, I9I9.

1,359,655, Patented Nov. 23, 1920.

2 SHEETS-SHEET I.

Illll my h. is t I L. ATWOOD.

DRAWING ATTACHMENT FOR CIRCULAR LQOMS.

APPLICATION FILED JULY 2, 1919.

1,359,655. Patented Nov. 23, 1920.

2 SHEETS-SHEET 2- E can a 11K 45-: @1400 H05 72 12 W lPATENT OFFICE.

LEONARD ATV/00D, OF BOSTON, MASSACHUSETTS.

DRAWING ATTACHMENT FOR CIRCULAR LOOMS.

Application filed July 2, 1919.

tachments for Circular Looms, of which the following is a specification.

This invention comprehends certain new and useful improvements in circular looms, and relates particularly to a drawing attachment for maintaining the woven tubular structure in cylindrical or round form while passing through the loom.

As is well known to those versed in the art to which this invention appertains, in weaving ordinary tubular structures such as soft hose or tubes made wholly of cotton on other textile fabrics, the woven structure is drawn out of the loom by passing it in a flat form through draw-off rollers, or between grooved rollers having a toothed or serrated surface not liable to injure the soft fabric. Although this operation of passing the tube in compressed condition between the draw-off rollers is satisfactory, owing to the fact that no permanent deformation of the tubular structure will be caused, yet such operation is totally unsatisfactory and inadequate when the tubular device or hose is a composite structure embodying metallic and fiber strands or is a structure composed entirely of metallic strands, for it is at once manifest that in such event, great care must be taken in order to preserve the tubular structure in a cylindrical and true form as when woven; there must be no kinks, the weaving must not be distorted or strained, and the fabric and metallic strands must not be disturbed either by undue tensile strain or compression at this stage of the weaving or manufacture.

It is also apparent that iii-weavingcomposite or metallic hose or similar tubular structures. the tension of the'warns and wires is much greater. in the draw off operation than when the structure is composed entirely of textile fabric as it requires much more force to be exercised to draw the woven composite structure through the loom and it becomes necessary to impart an increased fri t onal effect upon the weave to cause the structure or tube to pass along coincident; "wi h the weaving.

With a knowledge of these conditions,

Specification of Letters Patent. Patgnted N 23 1920 Serial No. 308,625.

invention has for its primary object an improved attachment for circular looms adapted to weave a metallic tubular structure or composite tubular structure composed of metallic strands and textile strands woven toogether, and the invention aims to positively and efiiciently draw the tubular structure through the loom without liability of mashing or unduly compressing the structure and otherwise avoiding the permanent deformation which would be incident to such straining and compression.

The invention also has for its object an improved attachment for circular looms embodying a flexibly mounted mandrel whereby the parts will frictionally engage with the tubular structure to properly draw it off without straining and at the same time avoid any tendency to compress or mash the walls thereof.

A still further object of theinvention is a draw off attachment of this general character which is so mounted that the operator can easily raise the frame in which the drawoff rollers are mounted so as to swing the rollers upwardly away from the flexible mandrel and woven structure, thereby enabling the operator to adjust the weave or to repla e any broken wires or cords which constitute the woven structure.

The invention also aims to generally improve this class of devices and to render them more useful and commercially profitable. Y

W'ith these and other objects in view which will more fully appear as the description proceeds. the invention consists in certain constructions, arranrz'ements and combinations of the parts that I shall hereinafter fully describe and claim.

For a full understanding of the invention. reference is to be had to the fo lowinc description and accompanying drawings in which,

i Figure 1. is a side elevation of improved drawing attachment. showing a portion of a hose or other tubular structure passing therethrouoh. parts bein shown in section to more clearly disclose the construction. a Fin. 2. is a view simil r to Fig. l. but

ticularly the relative operative positions of a mandrel and draw-off rollers which I employ.

Fig. 1, is a vertical cross section taken on the line 4-e1 of Fig. 7; showing a hinge and swivel connection which forms a part of my present invention.

Fig. 5, is a view in elevation of a train to in the following description and indicated in the accompanying drawings by like reference characters. 7

In weaving a tubular structure, the warps and woof must be laid and woven on a round weaving pin, designated 1 in the accompany ing drawing, said pin corresponding in diameter to the interior diameter of the woven fabric. In carrying out my invention, I flexibly mount by a universal joint connection in a socket formed in the weaving pin 1, the spherical lower end 2 of a mandrel 3 which is constructed in a number of sections (two in the present instance) connected together at their adjoining ends by a universal joint connection 1, which, in the present instance, consists of a spherical extremity formed on the upper section 5 of the man drel and a coupling member 6 which is screwed or otherwise secured on the adjoining threaded end 7 of the lower section 5 The upper section 5 of the mandrel is also formed with screw threads, as indicated at 7. V

Mounted on the respective sections 5 and 5 of the mandrel 3, are preferably turbinate or bulbous blocks 8 that are internally threaded for engagement with the screw threads 7 and 7% respectively, and which are designed to be held in adjusted position on the mandrel sections by means of locking nuts 9.

The blocks 8 which constitute compression retarders, in that they retard or prevent the inward compression of the walls of the hose or other tubular structure as it is drawn through the loom. are designedto co-act with draw-off rollers 10 which are arranged n laterally spaced pairs in the present in stance. one pair for each of the compression retarders 8 which are positioned between the rollers. as best i lustrated in Fig. 1. of the drawing. the. adjustable mounting of the compression retarders 8 enabling saidretarders to be moved to the proper points on the mandrel sections so as to come squarely between the closest oints of the grooved peripheries of the rollers. It is to be under stood that any desired number of sets of rollers may be employed, one set above the other and that they may be placed any desired distance apart and arranged in any desired way either in diametrical relation to each other or otherwise, as regards the compression retarders 8, so long as they properly engage the external wall of the tubular structure passing between the rollers and said retarders.

Tie rollers 10 have their shafts journaled in adjustable bearings or boxes 12 mounted in a frame 13, which is secured to or which forms part of a bar 14 adapted to extend across and rest upon the top of the loom frame 15. The shafts 11 carry gear wheels 16 which mesh with each other shown, the upper set of gear wheels being, in the present instance, driven from the lower set through the instrumentality ofan idler 17 and the lower shaft 11 constituting the drive shaft and provided with a driving pinion 18, or some equivalent device. Obviously, by flexibly mounting the mandrel 8 in the weaving pin 1, and by constructing the mandrel itself in sections flexibly connected together, the mandrel as a whole or any section thereof will at all times accommodate itself to variations in adjustments of the rollers 10 and hence all danger of straining or otherwise injuring the tubular structure will be prevented.

' Preferably the frame supporting ,bar 1 1 is pivotally mounted at one end as at 19 to swing about a horizontal axis whereby the operator can raise the frame and the rollers and swing them upwardly away from the flexible mandrel and the woven structure, thereby enabling the operator to adjust the weave or to replace any broken wires or cords which constitute the woven structure. Any desirable fastening device may be used to secure the bar 14 in its operative position, a hinged clamp 20 being employed in the present instance for the purposes of illustration. It will also be noted that a vertically disposed adjusting screw 21 is mounted in the loom frame 15 at the relatively free end of the bar 14. whereby said bar may be adjusted vertically at one end as required.

From the foregoing description in connection with the accompanying drawing, the operation of my improved circular loom attachment will be apparent. In the practical use of the device the metallic or composite structure is drawn through the loom over the flexible and flexibly mounted mandrel 3. by frictional engagement of the rollers ll) between which the'tubular structure passes. and the compression retarders within the tube. It is important that too much pressure be not exerted at any one given point.

while at the same time it is necessary that sul'licient and at times powerful tension must be imparted to the structure to draw it through the loom. Hence, I preferably employ a plurality of pairs or sets of rollers 10, although it is to be understood that the causing the woven structure to move along out of the loom at a uniform speed as fast as it is woven, while at the same time all liability of deformation owing to compres sion or tensile strains will be precluded.

It is to be understood that while my invention is designed particularly for use in weaving metallic tubular structures or combined metallic and textile structures, it is not limited to this use and it is not limited as regards the details of construction and relative arrangements and proportions of the parts, as various changes and modifications may be made without departing from the scope of the invention, as defined in the appended claims.

IVhat I claim is 1. In a loom of the character described, a mandrel formed in a plurality of sections terminally united to permit flexure in any direction.

2. In a loom of the character described, a weaving pin, and a mandrel formed in a plurality of sections, said sections being terminally united to each other and said pin to permit flexure in any direction.

3. The combination with a loom of the character described, of a mandrel over which the woven structure passes, said mandrel being constructed in sections having universal joint connection.

4. In combination with a loom of the character described, a mandrel over which the woven structure passes, a weaving pin, and a universal joint connection between the weaving pin and mandrel.

5. In combination with a loom of the character described, a weaving pin, and a mandrel having a universal joint connection with said weaving pin, said mandrel being constructed in longitudinally alined sections having a universal joint connection with each.

6. In combination with a loom of the character described, a mandrel over which the woven structure passes, a compression retarder adjustably mounted on said mandrel, and friction rollers adapted to engage the woven structure and draw it over said compression retarder.

7. In combination with a loom of'the character described, a flexibly mounted mandrel constructed in flexibly connected sections, compression retarders adjust-ably mounted on the respective sections and rollers adapted to engage the woven structure and draw it over said compression retarders.

8. In combination with a loom of the character described, a swinging frame, draw-off rollers carried by said frame, a flexible mandrel interposed between said rollers and over which the woven structure is intended to pass, the swinging mounting of the frame enabling the operator to swing the frame upwardly and strip the rollers from the mandrel and woven structure.

9. In a loom of the character described, the combination of a pivoted frame, friction rollers mounted therein, means for driving said rollers, and means for vertically adjusting said frame.

' 10. In a loom of the character described,

the combination of a pivoted frame, friction rollers mounted in said frame, means for driving said rollers, means for vertically adjusting said frame, and a flexibly mounted mandrelinterposed between said rollers.

11. In combination with a loom of the character described, frictional rollers adapted to engage the woven structure as it passes from the loom, adjustable bearings for the rollers, and a self centering mandrel over which the woven structure passes, said mandrel extending between said rollers, whereby the pressure of the woven structure is equalized by the self centering of the mandrel.

In testimony that I claim the foregoing invention, I have hereunto set my hand this 23rd day of June, 1919.

' LEONARD ATWOOD. 

